U.S. patent number 4,485,979 [Application Number 06/422,990] was granted by the patent office on 1984-12-04 for device for shaftless winding machines.
This patent grant is currently assigned to Jagenberg AG. Invention is credited to Hartmut Dropczynski.
United States Patent |
4,485,979 |
Dropczynski |
December 4, 1984 |
Device for shaftless winding machines
Abstract
In a shaftless machine for winding a web (4) on a roll (3), the
machine having a pair of carrier rollers (1,2) of which at least
one is driven, means (16) for introducing a roll into the gap
between said carrier rollers, an assembly (5) comprising an
ejection beam (6) and cutting (8) and fastening means (7), and
means (9-14) for pivoting the assembly about the axis of one of the
carrier rollers so as to eject a wound roll and, after a new roll
(18) is introduced, to cut the web and to fasten it to the new
roll, the improvement which comprises means (11-13) for displacing
the assembly transverse to the axes of the carrier rollers thereby
to adjust the position of the ejecting, cutting and fastening means
so as to accommodate rolls of different diameters.
Inventors: |
Dropczynski; Hartmut
(Dusseldorf, DE) |
Assignee: |
Jagenberg AG (Dusseldorf,
DE)
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Family
ID: |
6149640 |
Appl.
No.: |
06/422,990 |
Filed: |
September 24, 1982 |
Foreign Application Priority Data
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Dec 24, 1981 [DE] |
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3151256 |
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Current U.S.
Class: |
242/527.3;
242/532.3; 242/533.2; 242/542 |
Current CPC
Class: |
B65H
19/305 (20130101); B65H 19/2246 (20130101); B65H
2301/41826 (20130101); B60W 2552/30 (20200201) |
Current International
Class: |
B65H
19/22 (20060101); B65H 019/20 (); B65H
017/08 () |
Field of
Search: |
;242/56A,64,66,56R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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697285 |
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Nov 1964 |
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CA |
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2709684 |
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Sep 1977 |
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DE |
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Primary Examiner: Levy; Stuart S.
Assistant Examiner: Peters; Leo J.
Attorney, Agent or Firm: Sprung Horn Kramer & Woods
Claims
I claim:
1. In a shaftless machine for winding a web on a roll the machine
having a pair of carrier rollers of which at least one is driven,
means for introducing a roll into the gap between said carrier
rollers, an assembly comprising an ejection beam and cutting and
fastening means, and means for pivoting the assembly about the axis
of one of the carrier rollers so as to eject a wound roll and,
after a new roll is introduced, to cut the web and to fasten it to
the new roll, the improvement which comprises means for displacing
the assembly transverse to the axes of the carrier rollers thereby
to adjust the position of the ejecting, cutting and fastening means
so as to accommodate rolls of different diameters, the assembly
displacing means comprising at least one rail extending transverse
to the axes of the carrier rollers, a rack and pinion connection
between the assembly and pivoting levers, the rack extending
parallel to the rail, and a motor for driving the assembly along
the rail, the means for pivoting the assembly including a pair of
pivoting levers.
2. A machine according to claim 1, wherein the carrier rollers are
horizontal, the assembly pivoting means being capable of pivoting
the assembly to vertical position in the midplane between the
carrier rollers, the assembly displacing means operating on the
assembly in such vertical position.
3. A machine according to claim 1, wherein the assembly includes at
least one guide extending parallel to the carrier rollers axes, and
means for moving the cutting and fastening means along said guide.
Description
The invention is a device that is intended for shaftless winding
machines involving a pair of rotating carrier rollers and consists
of a fastening and cutting device combined by an ejection beam into
an assembly that pivots at an angle to the axes of one of the
carrier rollers.
Such a device is known from German OS 2 709 684. When the reels are
changed with the known device, the full reel is lifted slightly off
of one carrier roller and a core positioned on the carrier rollers
through the resulting gap. The reel is then restored to its
original position in the carrier-roller bed and subsequently
ejected over the other carrier roller by the ejection roller after
the assembly has pivoted. The fastening device inside the assembly
that has been pivoted into the carrier-roller bed then fastens the
web to the core and, finally, the cutting device cuts the web in
two.
The known device can be employed only with cores that are small
enough to fit into the wedge between the two carrier rollers before
the reel has been ejected and to pass through the gap between the
raised reel and the carrier roller. The assembly consisting of the
ejection beam and the fastening and cutting device can only be used
with reels of a particular diameter. Its elements are rigidly
positioned and its pivoting stroke preset. Since the wedge and gap
are relatively small, machines of this type can only be used for
winding paper, and the device known from OS 2 709 684 is not
appropriate for winding cardboard, which has to go onto larger
cores.
The objective of the invention is a device that can accept cores of
varying diameter in automatic reel changing.
The invention is a device of the type initially described and
attains this objective because the extent of pivoting of the
assembly about the axes of the carrier rollers is adjustable.
A moving assembly makes it possible to adjust to cores of various
sizes before or after the unit has been pivoted into position above
the carrier-roller bed. It is also possible to adjust the motion of
the unit to a desired core diameter before or after the unit has
been pivoted.
In one preferred embodiment of the invention a motor and a rack and
pinion drive the assembly along rails on the pivoting levers, a
relatively simple design.
It is also preferable to mount the assembly that consists in
accordance with the invention of the ejection beam and fastening
and cutting device so that it can be pivoted into an operating
position (the fastening and cutting position) in the midplane of
the winding machine above the carrier rollers and there moved up
and down. This will ensure that the fastening and cutting device
will always engage the core at its uppermost vertical line even
though the assembly moves in relation to the core. This is
important when the end of the web is to be fastened precisely to a
strip of glue or gummed tape on the vertical line on a reel of any
diameter.
It is also preferable to mount the fastening and cutting device on
the ejection beam in the invention in such a way that it can travel
horizontally along the rails. This allows continuous cutting of the
web and subsequent fastening of the resulting new web end to the
circumference of the reel.
The invention will now be specified with reference to the drawings,
in which
FIGS. 1 through 5 illustrate the winding machine at various stages
of changing a reel. Identical parts are identified in the different
figures with the same reference numbers.
At the stage shown in FIG. 1, a reel 3 rests on rotating carrier
rollers 1 and 2, at least one of which is powered, and is wound
with a web 4 as it rotates. An assembly 5, which consists of an
ejection beam 6, a fastening device 7 (represented in broken lines
because it lies behind the cutting device in the longitudinal
direction), and a cutting device 8, is mounted on two levers 9 that
are rigidly attached to each other and pivot around the axis of the
carrier roller 1 that the web is wrapped over. A motor 12 and a
rack and pinion 13 drive assembly 5 along rails 11 on pivoting
levers 9 across the axis of carrier roller 1. Fastening and cutting
device 7, 8 travels horizontally, parallel to the axes of carrier
rollers 1 and 2 along guides 14 on ejection beam 6.
When the winding machine is in operation, assembly 5 is pivoted on
pivoting levers 9 into the rest position shown in FIG. 1.
A core inserter 16 is mounted on arms 15 that pivot around the axis
of the carrier roller 2 around which the web is not wrapped. At the
stage shown in FIG. 1, core inserter 16 is in a ready position with
a core 18 resting on its bed 17. Another core 18 with a shorter
diameter and resting on a correspondingly smaller bed 17 is also
drawn with dot-and-dashed lines.
FIGS. 2 through 5 illustrate changing the reels.
In FIG. 2 lever 9 has pivoted up in the direction indicated by
arrow 19, ejecting the full reel 3 from the carrier-roller bed onto
a drop platform 20. Web 4 is pulled along behind. Upon arriving at
its forward position as illustrated in FIG. 2, ejection beam 6 can
be preadjusted to any core diameter by displacing assembly 5 along
rails 11. Levers 9 then pivot back in the direction indicated by
arrow 22 to retract unit 5 from the carrier-roller bed. Web 4 is
now slackened by releasing a brake for example or by lowering drop
platform 20 slightly with reel 3 resting on it.
Core inserter 16 now pivots up on arm 15 as shown in FIG. 3 and
drops a new core 18 into the carrier-roller bed, with web 4 resting
against part of the circumference of the core, and returns to the
ready position shown in FIG. 1, leaving the new core in the bed.
Another core 18 can now be placed in the bed 17 of core inserter
16.
As illustrated in FIG. 4, assembly 5 can, while core inserter 16 is
pivoting back into its ready position, pivot in the direction
indicated by arrow 19 into an operating position above the
carrier-roller bed. Even very delicate adjustments can be made in
the position of movable assembly 5 in relation to an inserted core
18 to ensure that fastening and cutting device 7, 8 will precisely
engage the core's upper vertical line. While assembly 5 is in the
position shown in FIG. 5, a drive mechanism will slide fastening
and cutting device 7, 8 along guides 14 on ejection beam 6 across
web 4 and parallel to the axis of core 18 to allow cutting device 8
to make a smooth transverse cut in web 4 and fastening device 8 to
fasten or glue the resulting new web end to the circumference of
core 18. The drive mechanism for moving device 7,8 includes a
driven shaft 22 operatively connected with guides 14 which
cooperate with U-shaped rail 23 and 24.
When web 4 has been cut and fastened, assembly 5 will pivot back
out of the operating position illustrated in FIG. 4 and into the
rest position in FIGS. 5 and 1, a pressure roller 21 will drop
against core 18, and carrier rollers 1 and 2 will begin rotating to
reinitiate the rotation and winding of core 18 with web 4.
It is understood that the specification and examples are
illustrative but not limitative of the present invention and that
other embodiments within the spirit and scope of the invention will
suggest themselves to those skilled in the art.
* * * * *